This is still a bit of a tender point with me HCA123! My PLA was turned down due to a lack of 'medical' trg, despite CFRG , the CM, and CFMSS supporting the PLA; it was rejected by Ottawa (24 hours before I departed for BHCA..grrr...repack!)
Of the 20-odd days of Basic Fd Trg, I found approximately 2 contained new material. These could have easily been accomplished through correspondance as they were strictly written assignments, but I digress.
If you want, I will email you my PLA application and you can feel free to use it as a guide. The fact that you have prior med exposure in a Res Fd Amb may indeed grant you a waiver. If you have done CAP, I think that most of the material on BFHSC will be a waste of your time. Think platoon (section really) orders, and off-loading an MLVW and setting up a tent. Repeat nine times. The medical estimate may be new to you though. The course is in desparate need of a revamp, and I have no idea why HCA are not required to attend CAP to begin with.
That being said, I thoroughly enjoyed my time on the BFHSC; I found it a very easy course, and it's always good to see how your peers function in a field environment. There is also significant social aspect attached to the course which I don't think was unique to my serial. Your previous experiences on CAP and the Fd Amb will be an asset to your coursemates. If you can spare 3 weeks out of your summer, then I'd recommend you go on the course.